Answer Happy

There are four students in Statistic class and students took the mid-term exam and the final exam. The results of the mid-term exam r and the final exam y are as follows in the order of (x,y): (2.2). (4,16), (6,20). (8.18).

(12) By using the same data, we obtain two regression equations ýi = a1 +3 ; and î; = a2 + xyi. In addition, we found 7 = 1 and y = 2. (a) Find â 1. 1 -2 <ối <-1 2 -1<âu < 0 3 0 <li <1 415ất < 2 5 None of the above. (b) Find &2. 1-2 <ô2 <-1 2 -1 <ô2 < 0 30 < 2 <1 41 < @2 < 2 5 None of the above. (c) Find r. 1 -0.8 <r<-0.2 2 -0.4 <r< 0 30<r< 0.4 4 0.4 <r <0.8 5 None of the above.